Answer: 2. "First class!" my mother exclaimed, with an intake of breath. "How did you end up there?"
"It was my fortieth birthday gift," your mother explained.
She looked over at your father, smiling. "Once in a lifetime, right?"
"Who knows?" he said, clearly proud of the extravagance. "It could become a terrible habit."
Explanation: Hema's parents are in shock at Kaushik's more expensive lifestyle which contrasts to their own more modest lifestyle, which further shows the socio-cultural gap in between the families as well. In the story, the upper-class style of spending was considered a western influence.